/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include<IOKit/IOLib.h>
#include<mach/kmod.h>
#include<libkern/c++/OSDictionary.h>
#include<libsa/kext.h>
#include<libsa/catalogue.h>
#include<libsa/malloc.h>
#include"kld_patch.h"/*****
* This function is used by IOCatalogue to load a kernel
* extension. libsa initially sets it to be a function
* that uses libkld to load and link the extension from
* within the kernel. Once the root filesystem is up,
* this gets switch to the kmod_load_extension() function,
* which merely queues the extension for loading by the
* kmodload utility.
*/externkern_return_t (*kmod_load_function)(char *extension_name);
externbool (*record_startup_extensions_function)(void);
externbool (*add_from_mkext_function)(OSData * mkext);
externvoid (*remove_startup_extension_function)(constchar * name);
/****
* IOCatalogue uses this variable to make a few decisions
* about loading and matching drivers.
*/externint kernelLinkerPresent;
class KLDBootstrap {
public:
KLDBootstrap();
~KLDBootstrap();
};
static KLDBootstrap bootstrap_obj;
/* The constructor creates a lock and puts entries into a dispatch
* table for functions used to record and load kmods.
*/KLDBootstrap::KLDBootstrap() {
malloc_init();
kmod_load_function = &load_kernel_extension;
record_startup_extensions_function = &recordStartupExtensions;
add_from_mkext_function = &addExtensionsFromArchive;
remove_startup_extension_function = &removeStartupExtension;
kernelLinkerPresent = 1;
}
/* The destructor frees all wired memory regions held
* by libsa's malloc package and disposes of the lock.
*/KLDBootstrap::~KLDBootstrap() {
kld_file_cleanup_all_resources();
/* Dump all device-tree entries for boot drivers, and all
* info on startup extensions. The IOCatalogue will now
* get personalities from kextd.
*/
clearStartupExtensionsAndLoaderInfo();
/* Free all temporary malloc memory.
*/
malloc_reset();
}